A press-release from Spire just arrived, they announed theirÂ*RIDGE Series PC Chassis. Â*The Ridge series are quality ATX form factor PC enclosures with contemporary looks. This middle/small tower str...

makes problems with psu as the psu fan intake hot air from the inside of the case and mixes it with the already hot inside of the psu.

While it is not good for some PSUs, for others which are cool under load it is OK.
I am using mine at bottom to take air from inside and improve airflow around graphics card.
And even so air going from PSU is under 40C.

But by having it at top you do not have this option therefore it is still not as good as having it at bottom since this case does not have fan slots at bottom.